#include<stdio.h>

int main(){
    // 计算平均
    int num1,num2,num3;
    printf("Please enter the first interger:");
    scanf("%d",&num1);

    printf("Please enter the second interger:");
    scanf("%d",&num2);

    printf("Please enter the third interger:");
    scanf("%d",&num3);

    double average = (num1 + num2 + num3) / 3.;
    printf("Average: %f\n",average);

    return 0;
}